Couple

カップル

kappuru

(two partners)

カップル

kappuru

(one of the pair of plates in a voltaic battery)

ペア

pea

(two partners)

一対

ittsui

(two partners)

二、三

(a small number of)

二つ

futatsu

(two of the same kind considered together)

二人

futari

(two of the same kind considered together)

偶力

gūryoku

(two forces that are equal in magnitude but opposite in direction, thus creating the turning effect of a torque or moment)

夫婦

fūfu

(two partners)

対

tsui

(two partners)

電対

(one of the pair of plates in a voltaic battery)